Rotational restraint methodology in a frozen mixing system and container

ABSTRACT

A container for containing food and/or beverage ingredients is described. The container is of a type which may be supported in a support while the ingredients inside the container are processed, such as by a rotating blade or other mechanism. The container includes anti-rotation elements positionable in anti-rotational contact with a corresponding protruding portion in a container support in a manner which restricts rotational movement of the vessel relative to the container support.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of and claims benefit of U.S. patent application Ser. No. 12/265,397 filed on Nov. 5, 2008, which is hereby incorporated by reference in the entirety.

TECHNICAL FIELD OF THE INVENTION

The present invention relates generally to the field of food and beverage containers and specifically to containers for holding foods and/or beverages during blending, whipping, stirring, etc.

BACKGROUND

Preparation of certain foods and beverages can involve blending, whipping, stirring, etc. the food or beverage using a rotary blade or mixer.

Methods and systems for making frozen drinks are described in patent numbers U.S. Pat. No. 5,803,377, U.S. Pat. No. 5,962,060, U.S. Pat. No. 6,326,047, U.S. Pat. No. 6,465,034, U.S. Pat. No. 6,474,862, U.S. Pat. No. 6,527,207 and U.S. Pat. No. 7,144,150, which are commonly-owned with the present application and which are incorporated herein by reference. These patents describes an apparatus which allows milkshakes and other frozen drinks to be quickly made by breaking up pre-frozen blocks of ingredients into small frozen particles using a rotating blade, and blending them with an added liquid also using the rotating blade. The ingredients to be frozen into frozen blocks are pre-mixed in liquid form, placed into serving cups which are the same serving cups in which the finished milkshake or frozen drinks are to be served, and then frozen into blocks conforming to the insides of the serving cups and stored.

According to the prior patents, when a milkshake or other frozen drink is to be made, a serving cup containing the frozen block is positioned in a cup holder which forms a part of the frozen drink machine. A rotating blade is lowered into the cup and bores through the frozen substance in the cup, grinding it into small frozen particles. Milk, water, or another liquid is added to the cup and is blended into the frozen substance by the rotating blade. The rotating blade also whips air into the frozen particle mixture in order to give the milkshake or frozen drink its proper volume, texture, and flavor delivery.

In this and other contexts, it is desirable to provide a container for a frozen drink (or other food or beverage) which may be supported in a cup holder while the ingredients the container inside are processed, and which is restrained against rotation which would otherwise be caused by the action of the rotating blade or other processing tool. It is further desirable to provide a container having an anti-rotation feature and which container is further suitable for serving directly to customers after its removal from the cup holder.

Various solutions are disclosed in U.S. Pat. No. 6,041,961 ('691 patent), which is also commonly owned with the present application and incorporated herein by reference. In one of the illustrated embodiments, that patent shows a cup bottom having an anti-rotation pattern extending from its lower surface. The patent shows in FIGS. 1 and 2 a pattern formed of six arcuate ridges radiating from a center portion of the cup bottom. The patent shows corresponding anti-rotation features, shown in FIG. 5 as a pattern of six radiating ribs, on the support upon which the cup sits during processing of the beverage within the cup. Because of the six-ridge/six-rib patterns, the illustrated embodiment creates six areas of contact between the anti-rotation pattern on the cup bottom and the anti-rotation features of the support. Each ridge on the cup bottom includes a sloped side wall that acts as a self aligning mechanism, so that if a cup is placed onto the support and the sloped side wall contacts the corresponding rib before the cup is fully seated, the angled wall causes the cup to twist slightly so that the cup slides into a fully engaged position within the anti-rotation pattern in the cup holder.

In a further modification put into commercial use, the number of anti-rotation elements on the cup support (not shown) was reduced to two members 48 or ribs spaced 180° as shown in FIG. 1, while the anti-rotation pattern 102 on the cup 100 remained at six ridges 104. Obviously, given the 180° spacing between the ribs, the pair of the ridges that are engaged by the ribs are likewise spaced 180°, giving balanced, symmetrical, restriction against rotation while imparting evenly balanced loads to the cup's anti-rotation pattern. Distributing/balancing the loads prevents damage to the cup during use and allows thinner walls to be used in the anti-rotation features of the cup, thus minimizing resin costs in the manufacture of the cup.

On occasion, the prior art cup of FIG. 1 will seat against the members 48 in a manner that prevents the cup from advancing fully onto the cup support. This positions the cup higher on/in the cup support than is intended, causing the interior of the cup bottom to be damaged by the mixing element processing the contents of the cup. The risk that the cup will be improperly positioned in this way is greatest in situations where consumers place the cup in the cup holder for themselves in a self-serve setting. Because these consumers are not aware of the need to be sure the cup fully advances into the cups support, it is important that the possibility of the lack of such full advancement be eliminated. To this end, the applicant has developed a new anti-rotation arrangement that promotes more consistent seating of the cup within the cup support.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing a bottom portion of a cup with a prior art anti-rotation feature. The cup is shown above a portion of a cup support having anti-rotation members engageable with the anti-rotation feature of the cup.

FIG. 2 is a perspective view of a cup showing a first embodiment of a new anti-rotation pattern.

FIG. 3A is a perspective view of the bottom of the cup of FIG. 2.

FIG. 3B is a perspective view of an alternative bottom for the cup of FIG. 2.

FIG. 4 is a perspective view of the cup of FIG. 2, showing the cup interior.

FIG. 5 is a perspective view of an exemplary cup holder.

FIG. 6 is a perspective view showing the interior of the cup holder of FIG. 5.

FIG. 7 is a perspective view of the bracket and anti-rotation members of the cup holder of FIG. 5.

FIG. 8 is similar to FIG. 5 and shows the cup positioned in the cup holder.

FIG. 9 is a bottom perspective view showing the cup in the cup holder.

FIG. 10 is similar to FIG. 9, but shows only the bracket of the cup holder.

DETAILED DESCRIPTION

FIGS. 2-4 show perspective views of an embodiment of a container 10. Container 10 (which will also be referred to as a cup) includes a cup wall 12 that defines an interior 14 (FIG. 4), and a cup bottom 16. During use, the container 10 contains food or beverage ingredients that are to be processed inside the cup using a rotating blade or other boring and/or blending device. Container 10 is provided with an anti-rotation mechanism designed to engage the container within a cup holder associated with the boring/blending device so as to prevent rotation of the cup during processing.

Anti-rotation pattern 18 is formed in the cup bottom 16. Pattern 18 includes outwardly protruding vanes 26 positioned to engage with a corresponding anti-rotation feature (described below) in a corresponding cup holder. In the FIG. 3A embodiment, three vanes are shown spaced 120° apart, however in other embodiments different numbers of vanes, including one or five vanes (see e.g. the 5-vane embodiment of FIG. 3B) might be used. Preferably, however, the vanes are arranged such that no two vanes are separated by 180°.

Referring to FIG. 3A, the cup bottom includes a circular center section 20 and a beveled circumferential section 22 extending between center section 20 and an outer rim 23. The cup bottom 16 further includes a recessed center portion 24 (as viewed from the cup interior) centered in the circular center section 20.

Vanes 26 radiate from the recessed center portion 24 and extend downwardly from the bottom surface of center section 20. Trailing edges 28 extend from each arcuate ridge 26 into the beveled circumferential section 22. Each vane 26 preferably includes a substantially triangular cross-section, formed by first and second side walls 30, 32 which meet along ridge 33. In the illustrated embodiment, the wall 30 is vertical or near vertical relative to center section 20, and the surface wall 32 is angled or curved in a counterclockwise direction as viewed from the bottom of the cup as in FIG. 3A. As is also visible in FIG. 3A, the lower edge of each of the walls 30, 32 (i.e. along the center surface 20) curves slightly in a counterclockwise direction. In a preferred embodiment of the container, the walls 30, 32 are joined at an angle of approximately 45°. The portion of the vane 26 facing the cup interior 14 forms a hollow groove 34 as shown in FIG. 4.

The triangular configuration of the anti-rotation pattern enhances the rigidity of the cup during use by creating a triangular structural element and by allowing the cup's ingredients to freeze down into the groove 34 created by the angled/curved wall 32 to form a frozen, rigid backing for the anti-rotation pattern. The other side wall 30 is approximately straight up and down so that as it resists rotation by pressing against a corresponding cup holder member, there is no upward force created, as would be the case if it were angled like the other side. In fact, by bringing this face 30 past vertical, a downward force can be generated which helps to keep the cup seated on the cup holder as torque is applied.

It should be noted that shapes other than a triangular cross-section, such as a rectangular cross-section, would also be quite effective in preventing rotation and (as with the triangular cross-section) would have the benefit of added strength due to their wide cross-section at the point where they meet the cup bottom. They would also posses the advantage of allowing the cup's ingredients to freeze down into the rectangular or other shaped groove created by the cross-section to form a frozen, rigid backing for the anti-rotation pattern.

FIG. 5 illustrates one type of cup holder 40 that might be used to support the cup 10 when used in frozen drink machine of the type described in the above-referenced prior patents, or in the frozen drink blender available from f'REAL! Foods, LLC, Orinda, Calif. As discussed in the prior patents, the frozen drink machine includes a rotatable blade on a shaft that is extendable into the cup 10. During use, the rotatable blade is lowered into the cup 10, where it grinds the frozen ingredients in the container and where it blends the ground frozen ingredients with an added liquid.

The cup holder 40 has an interior 42 for receiving the container 10 and a connector 44 that couples the cup holder to the blender or other type of food/beverage processor. Referring to FIG. 6, disposed within the interior 42 is a bracket 46 having anti-rotation members such as fins 48, each of which is laterally offset from the longitudinal axis of the holder 40 (and thus the cup 10). As best shown in FIG. 7, each fin 48 is provided with a wall 50 shaped to seat against wall 30 of one of the vanes 26 on the cup bottom. Wall 50 forms a ridge 52 at its intersection with a second, more curved, wall 54. This embodiment uses a pair of fins positioned 180° apart from one another as shown.

During use of container 10 with the cup holder 40 of a corresponding machine, the container is inserted into the interior of the cup holder as shown in FIG. 8. As the container 10 moves into the holder 40, one of the fins 48 moves into contact with the wall 30 of one of the vanes sufficient to prevent rotation of the cup within the holder during processing (e.g. grinding and blending) using a rotating blade in the cup. Since the fins 48 are separated by 180°, but no two vanes are separated by 180°, anti-rotational contact (i.e. contact that will restrain the cup against rotation during processing of the cup contents using a grinding, boring and/or mixing element) occurs only between a single one of the vanes and a single one of the fins, giving asymmetrical anti-rotational contact between the cup and the cup holder.

In an alternate embodiment of a holder 40, the anti-rotation features within the holder 40 are modified to eliminate one of the fins 48 on the bracket 46, leaving just a single fin (and thus a single anti-rotational contact) laterally offset from the center of the bracket 46. This holder is suitable for use with a cup having any number of vanes (whether even or odd), including vanes that are spaced 180° apart.

It should be recognized that a number of variations of the above-identified embodiments will be obvious to one of ordinary skill in the art in view of the foregoing description. Accordingly, the invention is not to be limited by those specific embodiments and methods of the present invention shown and described herein. Rather, the scope of the invention is to be defined by the following claims and their equivalents.

Any and all patents and patent applications referred to herein, including for purposes of priority, are incorporated herein by reference for all purposes. 

1. A method for rotationally restraining a vessel on a holder during processing of the contents of the vessel, comprising the steps of: providing a vessel having a side wall and a bottom wall having a first plurality of anti-rotation features laterally offset from the longitudinal axis of the vessel; providing a support having a least one second anti-rotation element; positioning the vessel on the support such that only one of the first plurality of anti-rotation features and only one of the second anti-rotational elements are in anti-rotational contact with one another; and processing ingredients within the vessel using a rotating element, wherein contact between the first plurality of anti rotation elements and second anti-rotation features prevents rotation of the vessel relative to the support.
 2. The method according to claim 1, wherein the support is provided to have only one second anti-rotation element.
 3. The method according to claim 1, wherein the support is provided to have only two anti-rotation elements.
 4. The method according to claim 2, wherein positioning the vessel positions the vessel such that the second anti-rotation element is laterally offset from the longitudinal axis of the vessel.
 5. The method according to claim 1, wherein no two of the first plurality of anti-rotation elements are offset from one another by an angle of 180°.
 6. A method for providing a food product and rotationally restraining a cup containing the product against a torque generated by a food preparation device used to prepare the food product, the method comprising: providing the cup, the cup comprising a cup wall that defines an interior and a cup bottom, the cup having an opening through which a blade may pass to prepare the food product; providing the food product in a frozen state within the interior of the cup; and providing an anti rotation mechanism formed within the cup bottom, the anti rotation mechanism configured to mate with a cup holder of the food preparation device, the anti rotation mechanism comprising: a first structural element having a first pattern and formed in the cup bottom of the cup wall to engage the container product within a cup holder associated with the food preparation device so as to prevent rotation of the cup during processing; a second structural element within a volume formed by the first pattern and comprised of the frozen food or beverage material within the interior, the first pattern comprising a plurality of vanes, the plurality of vanes comprising a greater number of vanes than a group of one or more stationary mating elements of the cup holder, the first pattern arranged such that only one of the plurality of vanes makes contact with a stationary mating element of the cup holder.
 7. A method for providing a food product and rotationally restraining a cup containing the product against a torque generated by a food preparation device used to prepare the food product, the method comprising: providing a cup having an open top, a sidewall, and a bottom; and providing a group of vanes formed within the bottom of the cup, the group of vanes configured to seat within a cup holder that comprises two or more elements radiating from a central point, the vanes of the cup arranged such that only one vane of the group may seat against and contact a radial element of the cup when the cup is inserted into the cup holder.
 8. A method for providing a food product and rotationally restraining a cup containing the product against a torque generated by a food preparation device used to prepare the food product, the method comprising: providing the cup, the cup comprising a cup wall that defines an interior and a cup bottom, the cup having an opening through which a blade may pass to prepare the food product; providing the food product in a frozen state within the interior of the cup; providing an anti rotation mechanism formed within the cup bottom, the anti rotation mechanism comprising a plurality of vanes radiating from a central location; and providing a food preparation machine comprising: a cup holder having a plurality of ridges extending radially from a central location; and a rotating blade that enters the cup to blend the frozen food product, wherein the blade creates a torque upon the cup, and wherein the rotation of the blade causes a single vane of the anti rotation mechanism to contact a single ridge of the plurality of ridges of the cup holder.
 9. The method of claim 8, wherein the vanes of the anti rotation mechanism are spaced approximately 120 degrees apart.
 10. The method of claim 8, wherein the ridges of the cup holder are spaced approximately 180 degrees apart.
 11. The method of claim 10, wherein no two of the vanes are spaced 180 degrees apart.
 12. The method of claim 8, further comprising rotating the cup no more than 65 degrees before a vane of the cup makes contact with a ridge of the cup holder.
 13. The method of claim 8, wherein the vanes of the cup provided allow no more than 65 degrees of rotation before a vane of the cup makes contact with a ridge of the cup holder.
 14. A method for providing a food product and rotationally restraining a cup containing the product against a torque generated by a food preparation device used to prepare the food product, the method comprising: providing the cup, the cup comprising a cup wall that defines an interior and a cup bottom, the cup having an opening through which a blade may pass to prepare the food product; providing the food product in a frozen state within the interior of the cup; providing an anti rotation mechanism formed within the cup bottom, the anti rotation mechanism, the anti rotation mechanism comprising a first plurality of vanes radiating from a central location; and providing a cup holder of the food preparation device comprising a second plurality of ridges radiating from a central location, the second plurality of ridges configured to sit between the vanes of the first plurality and to prevent rotation of the cup when a vane is rotated into a ridge, wherein only one of the plurality of vanes may seat upon one of the plurality of ridges when the cup is inserted into the cup holder.
 15. A method for providing a food product, the method comprising: providing a cup, the cup comprising a cup wall that defines an interior and a cup bottom, the cup having an opening through which a blade may pass to prepare a food product within the cup; providing the food product in a frozen state within the interior of the cup; providing an anti rotation mechanism formed within the cup bottom, the anti rotation mechanism, the anti rotation mechanism comprising a first plurality of vanes radiating from a central location; providing a cup holder comprising a second plurality of ridges radiating from a central location, the second plurality of ridges configured to sit between the vanes of the first plurality, the first and second pluralities arranged to allow no more than 65 degrees of rotation of the cup before a vane of the first plurality is rotated into a ridge of the second plurality, and thereafter to prevent rotation of the cup. 